Solve the problem.The loudness of a sound can be approximated by the formula d = 10 log10
, where d is the number of decibels. The higher the value of d, the louder the sound. Find the number of decibels when 
and 
A. 10,000 decibels
B. 4 decibels
C. 14 decibels
D. 40 decibels
Answer: D
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Solve the problem.A person with no more than $2000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the pharmaceuticals investment. Write a system of inequalities to describe the situation. Let 
to be invested in telecommunications and 
to be invested in pharmaceuticals.
A. x + y = 2000 y ? 3x x ? 0 y ? 0 B. x + y ? 2000 3x ? y x ? 0 y ? 0 C. x + y ? 2000 x ? 3y x ? 0 y ? 0 D. x + y = 2000 x ? 3y x ? 0 y ? 0
Solve.3x - (2x - 1) = 2
A. - 1
B. 
C. - 
D. 1
Find the sum.
A. 34 B. 22 C. 30 D. 39
Factor completely.9x2 + 18x + 8
A. (9x + 2)(x + 4) B. (3x + 2)(3x + 4) C. prime D. (3x - 2)(3x - 4)